A Supporting Design Method When Longwall FaceStrides across and Passes through a Roadway
In coal underground mining, situation of longwall face striding across (SAR) or passing through roadway (PTR) is very common, especially in an inclined coal seam mining. A roadway supporting design method, consisting of a model using to determine the minimal rock strata thickness and a segmental sup...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/8891427 |
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| author | Weidong Pan Xinyuan Li YiWei Li Xiaobin Li Qing Qiao Haoran Gong |
| author_facet | Weidong Pan Xinyuan Li YiWei Li Xiaobin Li Qing Qiao Haoran Gong |
| author_sort | Weidong Pan |
| collection | DOAJ |
| description | In coal underground mining, situation of longwall face striding across (SAR) or passing through roadway (PTR) is very common, especially in an inclined coal seam mining. A roadway supporting design method, consisting of a model using to determine the minimal rock strata thickness and a segmental supporting scheme, is developed. In addition, to represent the mechanical behaviour of the caved material authentically, an elastic model was developed. The results showed that the elastic model has a good agreement with the caved material mechanical behaviours at a relatively lower stress condition. By using a FDEM method, a real case in Xutuan coal mine is studied. Compared with the process without backfill, the z-displacement of cross-cut roof decreased shapely after backfilling, with a maximum z-displacement, decreases from 0.76 m to 0.13 m and from 0.39 m to 0.064 m in PTR and SAR section, respectively. Therefore, the possibility of fall of ground (FOG) and crushing accidents can be reduced effectively with backfilling material of wood cribs. And the maximum subsidence (SAR section side) of face floor is 0.16 m, which is small enough to ensure normal production. The results of this study are likely to be useful as a reference for the safe and efficient mining of coal resources under similar conditions. |
| format | Article |
| id | doaj-art-38c7e23bc3ef49f49ed33e88d382e345 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-38c7e23bc3ef49f49ed33e88d382e3452025-02-03T01:03:56ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422020-01-01202010.1155/2020/88914278891427A Supporting Design Method When Longwall FaceStrides across and Passes through a RoadwayWeidong Pan0Xinyuan Li1YiWei Li2Xiaobin Li3Qing Qiao4Haoran Gong5State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology-Beijing, Ding No. 11 Xueyuan Road, Haidian District, Beijing, ChinaState Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology-Beijing, Ding No. 11 Xueyuan Road, Haidian District, Beijing, ChinaState Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology-Beijing, Ding No. 11 Xueyuan Road, Haidian District, Beijing, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology-Beijing, Ding No. 11 Xueyuan Road, Haidian District, Beijing, ChinaSchool of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Ding No. 11 Xueyuan Road, Haidian District, Beijing, ChinaSchool of Emergency Management and Safety Engineering, China University of Mining and Technology-Beijing, Ding No. 11 Xueyuan Road, Haidian District, Beijing, ChinaIn coal underground mining, situation of longwall face striding across (SAR) or passing through roadway (PTR) is very common, especially in an inclined coal seam mining. A roadway supporting design method, consisting of a model using to determine the minimal rock strata thickness and a segmental supporting scheme, is developed. In addition, to represent the mechanical behaviour of the caved material authentically, an elastic model was developed. The results showed that the elastic model has a good agreement with the caved material mechanical behaviours at a relatively lower stress condition. By using a FDEM method, a real case in Xutuan coal mine is studied. Compared with the process without backfill, the z-displacement of cross-cut roof decreased shapely after backfilling, with a maximum z-displacement, decreases from 0.76 m to 0.13 m and from 0.39 m to 0.064 m in PTR and SAR section, respectively. Therefore, the possibility of fall of ground (FOG) and crushing accidents can be reduced effectively with backfilling material of wood cribs. And the maximum subsidence (SAR section side) of face floor is 0.16 m, which is small enough to ensure normal production. The results of this study are likely to be useful as a reference for the safe and efficient mining of coal resources under similar conditions.http://dx.doi.org/10.1155/2020/8891427 |
| spellingShingle | Weidong Pan Xinyuan Li YiWei Li Xiaobin Li Qing Qiao Haoran Gong A Supporting Design Method When Longwall FaceStrides across and Passes through a Roadway Advances in Materials Science and Engineering |
| title | A Supporting Design Method When Longwall FaceStrides across and Passes through a Roadway |
| title_full | A Supporting Design Method When Longwall FaceStrides across and Passes through a Roadway |
| title_fullStr | A Supporting Design Method When Longwall FaceStrides across and Passes through a Roadway |
| title_full_unstemmed | A Supporting Design Method When Longwall FaceStrides across and Passes through a Roadway |
| title_short | A Supporting Design Method When Longwall FaceStrides across and Passes through a Roadway |
| title_sort | supporting design method when longwall facestrides across and passes through a roadway |
| url | http://dx.doi.org/10.1155/2020/8891427 |
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